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High pH thresholding of beef with VNIR hyperspectral imaging

Lookup NU author(s): Dr Barbara Sturm


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© 2017 Initial quality grading of meat is generally carried out using invasive and occasionally destructive sampling for the purposes of pH testing. Precise pH and thresholds exist to allow the classification of different statuses of meat, e.g. for detection of dry, firm, and dark (DFD) (when dealing with cattle and sheep), or pale, soft exudative meat (when dealing with pork). This paper illustrates that threshold detection for pH level in beef with different freshness levels (fresh, fresh frozen-thawed, matured, and matured frozen-thawed). Use of support vector machine (SVM) analysis allowed for the classification of beef samples with a pH above 5.9, and below 5.6, with an accuracy of 91% and 99% respectively. Biochemical and physical conditions of the meat concerning the pH are discussed.

Publication metadata

Author(s): Crichton SOJ, Kirchner SM, Porley V, Retz S, von Gersdorff G, Hensel O, Sturm B

Publication type: Article

Publication status: Published

Journal: Meat Science

Year: 2017

Volume: 134

Pages: 14-17

Print publication date: 01/12/2017

Online publication date: 18/07/2017

Acceptance date: 17/07/2017

ISSN (print): 0309-1740

ISSN (electronic): 1873-4138

Publisher: Elsevier Ltd


DOI: 10.1016/j.meatsci.2017.07.012


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